﻿#define wangheng
#undef wangheng
#define wang
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace 预编译
{
    class Program
    {
        static void Main(string[] args)
        {
#if wangheng
            Console.WriteLine("wangheng defined");
#elif wang
            Console.WriteLine("wang defined");
#endif
#if DEBUG 
            Console.WriteLine("in debug mode");
#endif
            Console.ReadKey(); 
        }
    }
}
